7A-FE ITB Project Options

[morag]

I'm Starting Individual throttle bodies project on the 7afe.I'll be putting CBR954RR throttle bodies witch have 40mm inlet on the vacuumed side witch line up fairly good with the Stock 7afe intake manifold. The throttle bodies go from 44mm on the trumpet side to 40mm in the vacuum, witch i think will make good air velocity for the stock FE head.
I intend to make a vacuum box to collect the vacuum from the ITB's and spread them in the bigger hoses for brake,map sensor,Fuel pressure regulator and etc(I have yet to figure out all the detail). I will be using 315cc Supra injector witch i've tested with the stock manifold(And it goes way rich).
What has been done so far is that I've cut the stock intake(Which i've got from the junkyard) and tomorrow i will see where exactly will they match up. I intend to use the stock 7afe injector fuel rail and mount the itb's after it. Tomorrow ITB lining and cutting a bit more if needed. Ah and forgot i will be using stock 7afe map sensor, TPS sensor and cbr1000rr manual idle air controller. If anybody is interested in this I'll be happy to see your opinion. I hope I make all clear tomorrow I'll make some good pics on all parts so far and all i intend to do . See how this works out.

[Special_Edy]

Oh and set every throttlebody the same. The simple way involves placing a vacuum gauge on each seperate intake runner nipple. Adjust the throttle plates till the vacuum reading is even across all 4 cylinders.

The proper way to adjust them is to build this tool I cant remember the name of. Take 2 jars and fill them halfway with semi transparent oil of any type. Use a piece of hose and run it through the lid of both jars so that the hose is submerged in the liquid. Make sure the hose is sealed airtight with the jar. Next take 2 sections of hose and run 1 hose into each jar, this time the end of the hose should be in the air not submerged. Now, supposing your jars are airtight like they should be, you can hook the two hoses to two seperate ITB and balance out the pressure. Whichever intake runner is pulling more vacuum will pull the oil out of the other jar into its jar

This post has been edited by Special_Edy: Sep 7, 2012 - 9:30 AM

[Bitter]

Oh and set every throttlebody the same. The simple way involves placing a vacuum gauge on each seperate intake runner nipple. Adjust the throttle plates till the vacuum reading is even across all 4 cylinders.

The proper way to adjust them is to build this tool I cant remember the name of. Take 2 jars and fill them halfway with semi transparent oil of any type. Use a piece of hose and run it through the lid of both jars so that the hose is submerged in the liquid. Make sure the hose is sealed airtight with the jar. Next take 2 sections of hose and run 1 hose into each jar, this time the end of the hose should be in the air not submerged. Now, supposing your jars are airtight like they should be, you can hook the two hoses to two seperate ITB and balance out the pressure. Whichever intake runner is pulling more vacuum will pull the oil out of the other jar into its jar

Manometer and you want to use inches of water, its much more sensitive. I just used 4 cheap vacuum gauges to balance carbs on a cycle, worked fine.